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Version 05 / 2017

Biresin® CR84

Product Data Sheet

with Biresin® CH120-6 HardenerComposite resin system

Physical Data Resin (A) Hardener (B)

Individual Components Biresin® CR84 Biresin® CH120-6

Mixing ratio, parts by weight 100 28Mixing ratio, parts by volume 100 35Colour translucent colourless to yellowishViscosity, 25°C mPa.s ~4,450 ~35Density, 25°C g/ml 1.15 0.93

MixturePotlife, 100 g / RT, approx. values mins 300Mixed viscosity, 25°C, approx. values mPa.s 850

Processing

The material and processing temperatures should be in the range 18 - 35°C.The mixing ratio must be followed accurately to obtain best results. Deviating from the correct mix ratio will lead to lower performance. The fi nal mechanical and thermal values are dependent on the applied postcuring cycles.It is recommended to clean brushes or tools immediately after use with Sika Reinigungsmittel 5.Additional information is available in “Processing Instructions for Composite Resins”.

Product DescriptionBiresin® CR84 (A) epoxy resin with hardener Biresin® CH120-6 (B) is a lightly thickened epoxy resin system having a potlife up to 5 hours with a reduced tendency to drip from reinforcing fi bres during processing. The resin system can be cured at 80°C.

Application AreasThis high performance system is especially suited to the fi lament winding process due to its long open time and low drip properties. It can also be used where Tg of >100°C is needed.

Features / Advantages

Long pot life enables winding of large structures in one passThixotropic nature reduces dripping and spray from impregnated fi bres, also reduces mess and waste.The system is Germanischer Lloyd approved. Certifi cate No. WP 1420018 HH (attached)Low exothermic reaction temperature due to long pot life

Thermal data of neat resin after curing 8hr @ 80°CBiresin® CR84 resin (A) with Biresin® CH120-6 hardener (B)Heat distortion temperature ISO 75A °C 98

ISO 75B °C 101ISO 75C °C 90

Glass transition temperature ISO 11357 °C 104

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Mechanical Data, neat resin, approx. values after 8 h / 80°C (source: Sika internal) Biresin® CR84 resin (A) with Biresin® CH120-6 hardener (B)Tensile strength ISO 527 MPa 85Tensile E-Modulus ISO 527 MPa 3,200Elongation at break ISO 527 % 4.2Flexural strength ISO 178 MPa 132Flexural E-Modulus ISO 178 MPa 3,200Compressive strength ISO 604 MPa 116Density ISO 1183 g/cm³ 1.14Shore hardness ISO 868 - D 86Impact resistance ISO 179 kJ/m² 32

Development of Exotherm of Biresin® CR84 (A) with Biresin® CH120-6 (B) 100g / RT, insulated

PostcuringThe suitable cure cycle and the attainable mechanical and thermal values depend on various factors, such as laminate thickness, fi bre volume, reactivity of the resin system etc.An appropriate cure cycle could look as follows: Heat-up rate of ca. 0.2°C/Minute until approx. 10°C below the required glass transition temperature (Tg) Followed by a dwell at that temperature of between 2 and 12 hours. Part(s) should then be cooled at ~0.5°C per minuteThe specifi c postcure should be adapted to the required technical and economic requirements.To measure the mechanical performance of the resin system a SikaAxson standard cycle is used to ensure that the full Tg potential of the system in question is reached.

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Minimum shelf life of Biresin® CR84 resin (A) is 24 month and of Biresin® CH120-6 hardener (B) is 12 month under room conditions (18 - 25°C), when stored in original unopened containers.After prolonged storage at low temperature, crystallisation of resin (A) may occur. This is easily removed by warming up for a suffi cient time to at least 60°C.Containers must be closed tightly immediately after use. The residual material needs to be used up as soon as possible.

Health and Safety InformationFor information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Safety Data Sheet (SDS) containing physical, ecological, toxicological and other safety related data.

Disposal considerationsProduct Recommendations: Must be disposed of in a special waste disposal unit in accordance with the corresponding regulations.Packaging Recommendations: Completely emptied packagings can be given for recycling. Packaging that cannot be cleaned should be disposed of as product waste.

Value BasesAll technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstan ces beyond our control.

Legal NoticeThe information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith based on Sika‘s current knowledge and experience of the products when properly stored, handled and applied under normal conditions in accordance with Sika‘s recommendations. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fi tness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request.

Packaging (net weight, kg)Biresin® CR84 resin (A) 1,000 200 10Biresin® CH120-6 hardener (B) 900 20 3

Further information available at:

Sika Deutschland GmbHSubsidiary Bad Urach Tel: +49 (0) 7125 940 492Stuttgarter Str. 139 Fax: +49 (0) 7125 940 401D - 72574 Bad Urach Email: tooling@de.sika.comGermany Internet: www.sika.com